[Z06] Question for you Z06 experts
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From: Minnesota
Question for you Z06 experts
A friend of mine claimed that the tranny ratios in a MN12 Z06 tranny changed during the C5 Z06's run from 2001 to 2004. I said the ratios stayed the same. I did a search and I saw references to various changes to the tranny, but nothing on the gear ratio changing. Do I win? 
Last edited by Lawdogg; Jun 12, 2011 at 06:36 PM.
Team Owner
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From: Honolulu HI
Don't consider myself an "expert"...but I'd say yes, you win. Personally, I'm unaware of any changes to the MN12 gear ratios for any year C5Z. Interested to know what changes your friend claimed were made. Did he actually provide the gear ratios?
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From: Oklahoma
M12 6-Speed Manual
This transmission is unique to the Z06, and is the only transmission available for that model. It is not available on Corvette coupes or convertibles. It has more aggressive gearing to increase torque multiplication in most forward gears, allowing for more rapid acceleration and more usable torque at higher speeds.
A transmission temperature sensor was added to protect the M12 from higher thermal stresses. The sensor warns the driver via the Driver Information Center with a TRANS OVER TEMP light if thermal loads become excessive, meaning that the transmission could be damaged if not allowed to cool down.
Gear Ratios
LS1/MM6 LS6/M12
1st Gear 2.66:1 2.97:1
2nd Gear 1.78:1 2.07:1
3rd Gear 1.30:1 1.43:1
4th Gear 1.00:1 1.00:1
5th Gear 0.74:1 0.84:1
6th Gear 0.50:1 0.56:1
Reverse 2.90:1 3.28:1
No mention of a change there that I see. (from the z06 faq)
This transmission is unique to the Z06, and is the only transmission available for that model. It is not available on Corvette coupes or convertibles. It has more aggressive gearing to increase torque multiplication in most forward gears, allowing for more rapid acceleration and more usable torque at higher speeds.
A transmission temperature sensor was added to protect the M12 from higher thermal stresses. The sensor warns the driver via the Driver Information Center with a TRANS OVER TEMP light if thermal loads become excessive, meaning that the transmission could be damaged if not allowed to cool down.
Gear Ratios
LS1/MM6 LS6/M12
1st Gear 2.66:1 2.97:1
2nd Gear 1.78:1 2.07:1
3rd Gear 1.30:1 1.43:1
4th Gear 1.00:1 1.00:1
5th Gear 0.74:1 0.84:1
6th Gear 0.50:1 0.56:1
Reverse 2.90:1 3.28:1
No mention of a change there that I see. (from the z06 faq)
